PPPoE on fiber with the Linux machine as the router
Introduction Having switched from ADSL to FTTH (fiber to the home), I was delighted to discover that the same script that set up the pppoe connection for ADSL also works with the new fiber connection....
View ArticleRemapping keyboard keys to allow å, ä and ö
Motivation I have an English / Hebrew keyboard, but occasionally I also want to use the Swedish letters å, ä and ö. So idea is to sacrifice three keys on the keyboard for this purpose. But which ones?...
View Articlesystemd dependencies and processing /etc/fstab
The problem I wanted to solve On an embedded arm system running LUbuntu 16.04 LTS (systemd 229), I wanted to add a mount point to the /etc/fstab file, which originally was like this: # UNCONFIGURED...
View ArticleBracketed paste: Those ~0 and ~1 added around pasted text
Intro This is a super-short post, but I have a feeling it will evolve with time. Using ssh, pasting text with CTRL-V or the mouse’s middle button sometimes resulted in ~0 and ~1 around the pasted text....
View ArticleRunning KVM on Linux Mint 19 random jots
General Exactly like my previous post from 14 years ago, these are random jots that I took as I set up a QEMU/KVM-based virtual machine on my Linux Mint 19 computer. This time, the purpose was to...
View ArticleMigrating an OpenVZ container to KVM
Introduction My Debian 8-based web server had been running for several years as an OpenVZ container, when the web host told me that containers are phased out, and it’s time to move on to a KVM. This is...
View ArticleInstalling GRUB 2 manually with rescue-like techniques
Introduction It’s rarely necessary to make an issue of installing and maintaining the GRUB bootloader. However, for reasons explained in a separate post, I wanted to install GRUB 2.12 on an old...
View ArticleLinux kernel workqueues: Is it OK for the worker function to kfree its own...
Freeing yourself Working with Linux kernel’s workqueues, I incremented a kref reference count before queuing a work item, in order to make sure that the data structure that it operated on will still be...
View ArticleA function similar to Perl’s die() in bash
This is maybe a bit silly, but Perl has a die() function that is really handy for quitting a script with an error message. And I kind of miss it in Bash. So it can be defined with this simple...
View ArticleMeasuring how much RAM a Linux service eats
Introduction Motivation: I wanted to move a service to another server that is dedicated only to that service. But how much RAM does this new server need? RAM is $$$, so too much is a waste of money,...
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